sharding-jdbc horizontal and vertical sub-database sub-table environment construction

• Data
  sub-library sub-table concept and application scenarios Detailed
  sub-library sub-table brought some problems
  sharding-jdbc horizontal and vertical sub-library sub-table environment to build
  sharding-jdbc level sub-library sub-table real
  sharding-jdbc sub-library sub-table vertical combat

• Use docker to start two mysql databases

  docker run -it -e MYSQL_ROOT_PASSWORD=123456  -p 3306:3306   mysql
  docker run -it -e MYSQL_ROOT_PASSWORD=123456  -p 3307:3306   mysql
  

  

• Horizontal sub-tables are created using tables
  1. The structure is as follows:
  
  2. Table sql

  create table t_user_1
  (
  	user_id bigint null, //用户id
  	user_name varchar(20) null, //用户名称
  	user_age int null, //用户年龄
  	user_type int null //用户类型 1 会员 2 普通用户
  );
  create table t_user_2
  (
  	user_id bigint null, //用户id
  	user_name varchar(20) null, //用户名称
  	user_age int null, //用户年龄
  	user_type int null //用户类型 1 会员 2 普通用户
  );
  

• The horizontal sub-database uses tables to create
  1. The structure is as follows:
  
  2. Table sql

  create table t_user
  	(
  		user_id bigint null, //用户id
  		user_name varchar(20) null, //用户名称
  		user_age int null, //用户年龄
  		user_type int null //用户类型 1 会员 2 普通用户
  	);
  

• The vertical score table is
  not tested, we use the vertical score table every day

• Vertical sub-database
  1. Table structure
  
  2. Table sql

  create table t_order
  (
  	order_id bigint null,
  	user_id bigint null,
  	order_price int null
  );
  

• Project environment
  In order to let everyone know more about the configuration of sharding-jdbc, I decided to use spring-jdbc to access first, and then use mybatis and springBoot to know the detailed causes and consequences, so that everyone can understand better.

  1. Just create a java project, we use a simple main to do experiments, it is easier to set up the environment
  2. Introduce the jar package

  <!--单独使用java代码配置方式-->
      <!-- https://mvnrepository.com/artifact/org.apache.shardingsphere/sharding-jdbc-core -->
      <dependency>
          <groupId>org.apache.shardingsphere</groupId>
          <artifactId>sharding-jdbc-core</artifactId>
          <version>4.1.1</version>
      </dependency>
  
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-jdbc</artifactId>
          <version>4.3.17.RELEASE</version>
      </dependency>
  
      <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <version>5.1.47</version>
      </dependency>
  
      <!--druid-->
      <dependency>
          <groupId>com.alibaba</groupId>
          <artifactId>druid</artifactId>
          <version>1.1.21</version>
      </dependency>